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JDK 1.6
  javax.management.loading. MLetContent View Javadoc
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/*
 * @(#)MLetContent.java	1.23 05/11/17
 * 
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.management.loading;


// java import

import java.net.URL;
import java.net.MalformedURLException;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * This class represents the contents of the <CODE>MLET</CODE> tag.
 * It can be consulted by a subclass of {@link MLet} that overrides
 * the {@link MLet#check MLet.check} method.
 *
 * @since 1.6
 */
public class MLetContent {

  
    /**
     * A map of the attributes of the <CODE>MLET</CODE> tag 
     * and their values.
     */
    private Map<String,String> attributes;
  
    /**
     * An ordered list of the TYPE attributes that appeared in nested
     * &lt;PARAM&gt; tags.
     */
    private List<String> types;

    /**
     * An ordered list of the VALUE attributes that appeared in nested
     * &lt;PARAM&gt; tags.
     */
    private List<String> values;

    /**
     * The MLet text file's base URL.
     */
    private URL documentURL;
    /**
     * The base URL.
     */
    private URL baseURL;


    /**
     * Creates an <CODE>MLet</CODE> instance initialized with attributes read
     * from an <CODE>MLET</CODE> tag in an MLet text file.
     *
     * @param url The URL of the MLet text file containing the
     * <CODE>MLET</CODE> tag.
     * @param attributes A map of the attributes of the <CODE>MLET</CODE> tag.
     * The keys in this map are the attribute names in lowercase, for
     * example <code>codebase</code>.  The values are the associated attribute
     * values.
     * @param types A list of the TYPE attributes that appeared in nested
     * &lt;PARAM&gt; tags.
     * @param values A list of the VALUE attributes that appeared in nested
     * &lt;PARAM&gt; tags.
     */
    public MLetContent(URL url, Map<String,String> attributes,
		       List<String> types, List<String> values) {
	this.documentURL = url;
	this.attributes = Collections.unmodifiableMap(attributes);
	this.types = Collections.unmodifiableList(types);
	this.values = Collections.unmodifiableList(values);

	// Initialize baseURL
	//
	String att = getParameter("codebase");
	if (att != null) {
	    if (!att.endsWith("/")) {
		att += "/";
	    }
	    try {
		baseURL = new URL(documentURL, att);
	    } catch (MalformedURLException e) {
		// OK : Move to next block as baseURL could not be initialized.
	    }
	}
	if (baseURL == null) {
	    String file = documentURL.getFile();
	    int i = file.lastIndexOf('/');
	    if (i > 0 && i < file.length() - 1) {
		try {
		    baseURL = new URL(documentURL, file.substring(0, i + 1));
		} catch (MalformedURLException e) {
		    // OK : Move to next block as baseURL could not be initialized.
		}
	    }
	}
	if (baseURL == null)
	    baseURL = documentURL;

    }
    
    // GETTERS AND SETTERS
    //--------------------

    /**
     * Gets the attributes of the <CODE>MLET</CODE> tag.  The keys in
     * the returned map are the attribute names in lowercase, for
     * example <code>codebase</code>.  The values are the associated
     * attribute values.
     * @return A map of the attributes of the <CODE>MLET</CODE> tag 
     * and their values.
     */
    public Map<String,String> getAttributes() {
	return attributes;
    }
  
    /**
     * Gets the MLet text file's base URL.
     * @return The MLet text file's base URL.
     */
    public URL getDocumentBase() {
	return documentURL;
    }

    /**
     * Gets the code base URL.
     * @return The code base URL.
     */
    public URL getCodeBase() {
	return baseURL;
    }
  
    /**
     * Gets the list of <CODE>.jar</CODE> files specified by the <CODE>ARCHIVE</CODE> 
     * attribute of the <CODE>MLET</CODE> tag.
     * @return A comma-separated list of <CODE>.jar</CODE> file names.
     */
    public String getJarFiles() {
	return getParameter("archive");
    }

    /**
     * Gets the value of the <CODE>CODE</CODE> 
     * attribute of the <CODE>MLET</CODE> tag.
     * @return The value of the <CODE>CODE</CODE> 
     * attribute of the <CODE>MLET</CODE> tag.
     */
    public String getCode() {
	return getParameter("code");
    }

    /**
     * Gets the value of the <CODE>OBJECT</CODE>
     * attribute of the <CODE>MLET</CODE> tag.
     * @return The value of the <CODE>OBJECT</CODE> 
     * attribute of the <CODE>MLET</CODE> tag.
     */
    public String getSerializedObject() {
	return getParameter("object");
    }

    /**
     * Gets the value of the <CODE>NAME</CODE>
     * attribute of the <CODE>MLET</CODE> tag.
     * @return The value of the <CODE>NAME</CODE>
     * attribute of the <CODE>MLET</CODE> tag.
     */
    public String getName() {
	return getParameter("name");
    }

 
    /**
     * Gets the value of the <CODE>VERSION</CODE>
     * attribute of the <CODE>MLET</CODE> tag.
     * @return The value of the <CODE>VERSION</CODE>
     * attribute of the <CODE>MLET</CODE> tag.
     */
    public String getVersion() {
	return getParameter("version");
    }

    /**
     * Gets the list of values of the <code>TYPE</code> attribute in
     * each nested &lt;PARAM&gt; tag within the <code>MLET</code>
     * tag.
     * @return the list of types.
     */
    public List<String> getParameterTypes() {
	return types;
    }

    /**
     * Gets the list of values of the <code>VALUE</code> attribute in
     * each nested &lt;PARAM&gt; tag within the <code>MLET</code>
     * tag.
     * @return the list of values.
     */
    public List<String> getParameterValues() {
	return values;
    }

    /**
     * Gets the value of the specified    
     * attribute of the <CODE>MLET</CODE> tag.
     *
     * @param name A string representing the name of the attribute.
     * @return The value of the specified    
     * attribute of the <CODE>MLET</CODE> tag.
     */
    private String getParameter(String name) {
	return attributes.get(name.toLowerCase());
    }
  
}

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